Effect of Pb2+ on corrosion behaviour of 201, 304 and 316L stainless steel in methanesulfonic acid

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-10-03 DOI:10.1016/j.electacta.2025.147489

Keyi Li, Yunlong Bai, Wei Wang, Feng Xie, Gao Bo

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引用次数: 0

Abstract

Methanesulfonic acid (MSA) has emerged as an environmentally benign and low-toxicity leaching agent for the hydrometallurgical recycling of spent lead paste (SLP). During the recycling process, stainless steels (SS) used as reaction vessels, stirring paddles, and cathode plates face corrosion from MSA. The released metal ions from SSs compromise the purity of metallic lead and increase energy consumption. Therefore, investigating suitable SS materials for this system holds significant economic implications. In this study, the influence of Pb²⁺ and temperature on the corrosion behaviour of 201, 304 and 316L SS in MSA solution were investigated. The results showed that the presence of Pb²⁺ significantly enhances the corrosion resistance of 201 and 304 SS. This phenomenon is ascribed to the synergistic interplay of two key mechanisms: firstly, the underpotential deposition (UPD) of Pb²⁺ results in a marked elevation in the overpotential of the hydrogen evolution reaction (HER); secondly, the redissolution of precipitated metallic lead during prolonged immersion offers effective cathodic protection. The chemical composition of metallic elements in SS exerts a significant influence on the corrosion behaviour of SS. The formation mechanism of the passive film of SSs was investigated using the point defect model (PDM). These findings establish a theoretical foundation for selecting appropriate materials for the hydrometallurgical recycling of SLP using MSA.

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Pb2+对201、304和316L不锈钢在甲磺酸中腐蚀行为的影响

甲基磺酸（MSA）作为一种环保型、低毒的浸出剂，在废铅膏的湿法冶金回收中得到了应用。在回收过程中，用作反应容器、搅拌桨和阴极板的不锈钢（SS）面临MSA的腐蚀。SSs释放的金属离子降低了金属铅的纯度，增加了能量消耗。因此，为该系统研究合适的SS材料具有重要的经济意义。研究了Pb2+和温度对201、304和316L不锈钢在MSA溶液中腐蚀行为的影响。结果表明，Pb2+的存在显著提高了201和304不锈钢的耐蚀性，这是两个关键机制协同作用的结果：Pb2+的欠电位沉积（UPD）导致析氢反应（HER）过电位显著升高；其次，在长时间浸泡过程中，沉淀金属铅的再溶解提供了有效的阴极保护。采用点缺陷模型（PDM）研究了不锈钢钝化膜的形成机理。研究结果为MSA湿法回收SLP材料的选择提供了理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.